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Need wiring diagram for cumins 6inch bench grinder three qtr hrs

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Posted on Jan 02, 2017

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SOURCE: Bench Grinders Usage

Grinding is the fastest way to deburr a sharp corner or dress the end of threaded rod or bar stock that's been cut to length. Fit a grinder with a wire wheel, and you have a handy tool for removing rust. Then switch to a buffing wheel and you're ready to polish metal to a mirrorlike sheen. But for most of us, grinders are essential for shaping and sharpening hardened tool steel and high-speed steel.

Posted on Aug 27, 2008

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SOURCE: Bench Grinders Safety issues

Goggles or safety glasses need to be worn to protect the operator's eyes from the sparks and metal filings that result. Depending on the workpiece and time of exposure, hearing protection may also be required, the dust produced is also potentially hazardous. The toolrest (or workrest) should be mounted slightly below the center of the grinding wheel with less than 3 mm clearance from the wheel. This prevents the work from jamming between the toolrest and the wheel. Grinding wheels designed for steel should not be used for grinding softer metals, like aluminium. The soft metal gets lodged in the pores of the wheel and expand with the heat of grinding. This can dislodge pieces of the grinding wheel. Wire brushes require particular attention for the safety of the operator and bystanders as the metal wires may become dangerous projectiles as they could bind with the object being brushed and so throw it away with great energy. The machine needs to be securely mounted to a pillar or a bench to be used safely and effectively, often with an emergency stop switch or pedal fitted close by the machine, for use in emergencies.

Posted on Aug 27, 2008

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SOURCE: switch and capacitor crapped out on 1/2 hp Sears bench grinder

Replacement should be simple. Just do a one for one hookup with the new part, after you unplug it first.
For a diagram go to;

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=397.1949&productCategoryId=0721000&brandId=0247&modelName=CRAFTSMAN-1%2F2-H.P.-GRINDER&diagramPageId=00001&documentId=00023041&pop=flush

Posted on Mar 28, 2009

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SOURCE: bench grinder, 110/220?? wired up properly

LIKELY the capacitor which is usually in the base is bad.

The capacitor shifts the phase angle in one of the two windings which creates a pseudo rotating field to start rotation.

Posted on Nov 16, 2009

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1 Answer

Need to convert from 220v to 110v. Where can I get a wiring diagram for an unidentified bench grinder?


To convert it its possible more expensive then buy an other grinder but there is some trick to connect in serial on the powercord a light bulb on a special choosen ability differs on the RPM or use a variable power resistor also in serial connection between on one of the 2 wires on the powercord.

Nov 16, 2015 | Grinders

1 Answer

I need a capacitor #1343835 which has been discontinued. What replacement part will do the same job<


take the capacitor and the motor details (from the attached plate on the grinder ) to a motor rewind shop and they will have a capacitor suitable for the job
the terminals may be different so get terminals as well from them to put on the wires of the motor

Oct 11, 2015 | Delta GR150 6Inch Bench Grinder with Lamp

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Need an on/off switch for a buffalo bench grinder model B-6CB 1/2 hp. 41/2 amp. serial #775713


I had the same problem with a Northern Tools bench grinder. These are made in China and parts are hard to come by. I had enough room after removing the old broken on/off switch to install a single pole 15 amp light switch like you use in your home. I simply installed it horizontally and then put the switch cover on. It works perfectly. If you do not have enough room then look for any 15 amp or larger switch that will fit in the housing. Any on/off switch will work. You could even mount the switch on the bench in a switch housing and run the wires from the grinder to the switch and back if need be. Just be safe and make sure there are no exposed wires. As a last resort you could remove the switch connect the wires, eliminating the switch and use a plug in wall switch such as this. 4147a14.png

Apr 23, 2010 | BUFFALO 10" Bench Grinder

1 Answer

Bench grinder, 110/220?? wired up properly according to diagram on grinder, just turns on as soon as it's plugged in but it just humms, it does not spin the grinding wheel.it is a monster w/ a 3/4 hp...


LIKELY the capacitor which is usually in the base is bad.

The capacitor shifts the phase angle in one of the two windings which creates a pseudo rotating field to start rotation.

Nov 07, 2009 | Saws

1 Answer

Have an old sears craftsman 1/4 hp grinder model 397.19501 wires have been disconnected. I want to rewire and test. Does anyone know how to connect the wires? There are 2 copper tabs under the on/off...


the two copper tabs under the on off switch are to break the power source.connect incoming power to one of these(black) then a short piece of wire from the other tab under switch to one of the three tabs under plate that is marked hot or l1 is probably #2 but you need to be sure. the white is the nuetral or l2 which is most likely #3 and the green is the ground most likely #4 I would definately look online for a wiring diagram to be sure if they are not marked with L1 L2 and GND

Oct 10, 2009 | Black & Decker 3/4 Hp, 8" 205MM, Heavy...

1 Answer

Older sears bench grinder wont run 1/3 hp model 397 19581


Hi again, OK, Well since I don't have a wiring diagram and the colors don't help. I am also going to assume it is 110VAC. The larger wires are probably the run or primary, it you remember which ones were connected it will help with polarizing. ( getting it to run in the right direction as well as the start and primary working together). You can use the two terminal switch but you should use a three wire cord. Use the switch to break the neutral and ground the case. The connections should be as follows: Connection 1, would have one of the primaries and one of the starts to neutral. Connection 2, the other start to the relay. Connection 3, the coil side of the relay to the remaining primary. ( if the relay has two connections on one end and one on the other it would be the single) Connection 4, the 3rd position on the relay to hot. That is how a split phase is wired. You may find a simple wiring diagram on the net if you type split phase motor wiring diagram. Good Luck to you, this should Fixya!

Mar 04, 2009 | Grinders

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